Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1976-01-22
1977-07-12
Gallagher, R. J.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07D27782
Patent
active
040353796
ABSTRACT:
A process for the production of a 2-amino-benzothiazole having the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and are hydrogen, halogen, alkyl or alkoxy. A phenylthiourea having the formula: ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are defined as above, is added to a cyclization agent in the absence of a solvent and allowing the phenylthiourea to cyclize to form 2-amino-benzothiazole in salt form. Filtering the salt of the 2-amino-benzothiazole out of the reaction mixture.
Gallagher R. J.
Lonza Ltd.
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